Comparison of electromagnetic performance and power losses of a high-speed machine fed by PWM and PAM inverter strategies

M. M J Al-Ani, J. Carter, M. L. Jupp

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

This paper presents a comparative study of electromagnetic performance and power losses of a high-speed surface-mounted permanent magnet (SPM) machine supplied by a pulse-width modulation (PWM) and pulse-amplitude modulation (PAM), also known as quasi-square wave modulation (QSM). In the simulation the inverter is operated at different DC-bus voltage levels and different modulation indices, i.e. amplitude and frequency, for the PWM. The analysis is achieved using circuit simulation of the inverter linked with a 2D-finite element analysis (FEA) of the machine. The comparison focuses on the phase current and voltage, and distortion of the torque waveforms and the core, rotor and inverter losses. It is found that, at higher DC-bus voltage, higher phase current distortion is found and consequently higher torque ripple and induced harmonics in the rotor loss. Moreover, similar effect is found when higher amplitude modulation index is applied. Furthermore, higher frequency modulation index results in lower phase current harmonics and hence lower torque ripple and rotor loss however, this comes at the expense of the inverter loss.

Original languageEnglish
Title of host publicationIET Conference Publications
PublisherInstitution of Engineering and Technology
Number of pages6
Volume2016
EditionCP684
ISBN (Print)9781785611889
DOIs
Publication statusPublished - 10 Nov 2016
Event8th IET International Conference on Power Electronics, Machines and Drives - Glasgow, United Kingdom
Duration: 19 Apr 201621 Apr 2016
Conference number: 8

Conference

Conference8th IET International Conference on Power Electronics, Machines and Drives
Abbreviated titlePEMD 2016
CountryUnited Kingdom
CityGlasgow
Period19/04/1621/04/16

Fingerprint

Pulse amplitude modulation
Pulse width modulation
Modulation
Torque
Rotors
Electric potential
Amplitude modulation
Circuit simulation
Frequency modulation
Permanent magnets
Finite element method

Cite this

Al-Ani, M. M. J., Carter, J., & Jupp, M. L. (2016). Comparison of electromagnetic performance and power losses of a high-speed machine fed by PWM and PAM inverter strategies. In IET Conference Publications (CP684 ed., Vol. 2016). Institution of Engineering and Technology. https://doi.org/10.1049/cp.2016.0363
Al-Ani, M. M J ; Carter, J. ; Jupp, M. L. / Comparison of electromagnetic performance and power losses of a high-speed machine fed by PWM and PAM inverter strategies. IET Conference Publications. Vol. 2016 CP684. ed. Institution of Engineering and Technology, 2016.
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abstract = "This paper presents a comparative study of electromagnetic performance and power losses of a high-speed surface-mounted permanent magnet (SPM) machine supplied by a pulse-width modulation (PWM) and pulse-amplitude modulation (PAM), also known as quasi-square wave modulation (QSM). In the simulation the inverter is operated at different DC-bus voltage levels and different modulation indices, i.e. amplitude and frequency, for the PWM. The analysis is achieved using circuit simulation of the inverter linked with a 2D-finite element analysis (FEA) of the machine. The comparison focuses on the phase current and voltage, and distortion of the torque waveforms and the core, rotor and inverter losses. It is found that, at higher DC-bus voltage, higher phase current distortion is found and consequently higher torque ripple and induced harmonics in the rotor loss. Moreover, similar effect is found when higher amplitude modulation index is applied. Furthermore, higher frequency modulation index results in lower phase current harmonics and hence lower torque ripple and rotor loss however, this comes at the expense of the inverter loss.",
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Al-Ani, MMJ, Carter, J & Jupp, ML 2016, Comparison of electromagnetic performance and power losses of a high-speed machine fed by PWM and PAM inverter strategies. in IET Conference Publications. CP684 edn, vol. 2016, Institution of Engineering and Technology, 8th IET International Conference on Power Electronics, Machines and Drives, Glasgow, United Kingdom, 19/04/16. https://doi.org/10.1049/cp.2016.0363

Comparison of electromagnetic performance and power losses of a high-speed machine fed by PWM and PAM inverter strategies. / Al-Ani, M. M J; Carter, J.; Jupp, M. L.

IET Conference Publications. Vol. 2016 CP684. ed. Institution of Engineering and Technology, 2016.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Y1 - 2016/11/10

N2 - This paper presents a comparative study of electromagnetic performance and power losses of a high-speed surface-mounted permanent magnet (SPM) machine supplied by a pulse-width modulation (PWM) and pulse-amplitude modulation (PAM), also known as quasi-square wave modulation (QSM). In the simulation the inverter is operated at different DC-bus voltage levels and different modulation indices, i.e. amplitude and frequency, for the PWM. The analysis is achieved using circuit simulation of the inverter linked with a 2D-finite element analysis (FEA) of the machine. The comparison focuses on the phase current and voltage, and distortion of the torque waveforms and the core, rotor and inverter losses. It is found that, at higher DC-bus voltage, higher phase current distortion is found and consequently higher torque ripple and induced harmonics in the rotor loss. Moreover, similar effect is found when higher amplitude modulation index is applied. Furthermore, higher frequency modulation index results in lower phase current harmonics and hence lower torque ripple and rotor loss however, this comes at the expense of the inverter loss.

AB - This paper presents a comparative study of electromagnetic performance and power losses of a high-speed surface-mounted permanent magnet (SPM) machine supplied by a pulse-width modulation (PWM) and pulse-amplitude modulation (PAM), also known as quasi-square wave modulation (QSM). In the simulation the inverter is operated at different DC-bus voltage levels and different modulation indices, i.e. amplitude and frequency, for the PWM. The analysis is achieved using circuit simulation of the inverter linked with a 2D-finite element analysis (FEA) of the machine. The comparison focuses on the phase current and voltage, and distortion of the torque waveforms and the core, rotor and inverter losses. It is found that, at higher DC-bus voltage, higher phase current distortion is found and consequently higher torque ripple and induced harmonics in the rotor loss. Moreover, similar effect is found when higher amplitude modulation index is applied. Furthermore, higher frequency modulation index results in lower phase current harmonics and hence lower torque ripple and rotor loss however, this comes at the expense of the inverter loss.

KW - AC machine

KW - High-speed electrical machine

KW - PAM

KW - PWM

KW - Quasi-square modulation

KW - Six-step

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BT - IET Conference Publications

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Al-Ani MMJ, Carter J, Jupp ML. Comparison of electromagnetic performance and power losses of a high-speed machine fed by PWM and PAM inverter strategies. In IET Conference Publications. CP684 ed. Vol. 2016. Institution of Engineering and Technology. 2016 https://doi.org/10.1049/cp.2016.0363